As it turned out, a windowsXP machine does not work in qemu-kvm >= 0.15 (it loses network and USB entirely) if it is using "Standard PC" HAL. In 0.14 it worked fine, but not in 0.14 (I haven't tried any in-between versions yet). There are several HAL types available in winXP: these are "Uniprocessor PC with MPS" (or Multiprocessor), also two ACPI types, and "Standard PC". All the other HAL types appears to work fine, but not "Standard PC". I haven't debugged further yet, -- because it were not easy to find out what was causing the regression and how to reproduce it, and also because I don't think it is the right HAL for qemu-kvm guest anyway. So, if anybody have some thoughts about this issue, and especially if you know a way to switch winXP HAL type to some ACPI variant without reinstalling, please speak up.. ;) Debian bugreport for a reference: http://bugs.debian.org/647312 Reproducer: install a winXP guest on kvm with -no-acpi so it chooses an "Uniprocessor with MPS" HAL. Switch it to "Standard PC" in device manager, reboot -- in 0.15+ it does not work anymore, while in 0.14 it continues to work fine. Thank you! /mjt -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html